EP3660579B1

EP3660579B1 - 3d display device and method for preparing same

Info

Publication number: EP3660579B1
Application number: EP18755693.1A
Authority: EP
Inventors: Weipin HU; Yun Qiu; Xiao Sun; Hebin Zhao; Yanfeng Wang
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Priority date: 2017-07-27
Filing date: 2018-02-28
Publication date: 2024-02-21
Anticipated expiration: 2038-02-28
Also published as: CN109307946B; EP3660579A1; US11409153B2; WO2019019634A1; CN109307946A; EP3660579A4; US20210199985A1

Description

RELATED APPLICATIONS

The present application claims the benefit of Chinese Patent Application No. 201710623150.1, filed on July 27, 2017 , the entire disclosures of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to the field of display technology, and particularly to a 3D display device and a manufacturing method thereof.

BACKGROUND

In a conventional 3D display device, 3D display is realized by using a grating and a display panel, thereby providing a desired visual experience.
WO2014063411A1 discloses a stereoscopic display device, comprising: a flat-panel display device, wherein the flat-panel display device comprises a thin-film transistor (TFT) substrate (501) and a colour film (CF) substrate (502) which are oppositely arranged. The TFT substrate (501) and the CF substrate (502) respectively comprise a plurality of rows of sub-pixels (505, 1005) correspondingly arranged. Each row of sub-pixels (505, 1005) on the CF substrate (502) has the same colour, and a first shading part is arranged between two adjacent sub-pixels (505, 1005); and each sub-pixel (505, 1005) on the TFT substrate (501) is controlled by a TFT (506), and each sub-pixel (505, 1005) on the CF substrate (502) or each sub-pixel (505, 1005) on the TFT substrate (501) is provided thereon with second shading parts (510, 802, 1006), and each sub-pixel (505, 1005) on the CF substrate (502) or each sub-pixel (505, 1005) on the TFT substrate (501) is divided into m parts by the second shading parts (510, 802, 1006), where m is greater than 1, and m is an integer. Each sub-pixel (505, 1005) is divided into a plurality of parts using the second shading parts (510, 802, 1006), and the spacing of the moiré fringes is effectively reduced, thereby mending the problem of interference in the moiré fringes.
CN102289016A discloses a display device, a liquid crystal panel, a color filter and a manufacturing method thereof. The color filter includes: a substrate; a black matrix formed on one side of the substrate; and color lenticular lenses formed between the black matrixes.
CN04977724 A discloses a 3D display with an array substrate and a color filter substrate having a parallax grating on the viewer surface side of the color filter substrate. The strip width sum P of the width A of a translucent part of the parallax barrier and the width B of a shading part of the parallax barrier is determined according to CN 104 977 724 A by the width m of a sub-pixel and the pupil spacing E of human eyes by satisfying the equation P=2mE/(E-m).
US 2016/223860 A1 discloses a 3D display with a black-matrix grating having alternating strips of shielding areas and opening areas that respectively correspond to RGB pixels of a right-side viewing image and a left-side viewing image. The opening areas have thin sub-shielding areas disposed between RGB sub-pixel units.
US 2014/063382 A1 discloses a 3D display having a parallax barrier formed on the interior side of a base substrate of a color-filter substrate of the display panel. A transparent layer is formed on the parallax barrier to separate it from the color filters formed on the transparent layer, the color filters being separated by a black matrix also formed on the transparent layer.

SUMMARY

According to an aspect of the present invention, a 3D display device according to appended claim 1 is provided.
Optionally, in some embodiments, the second substrate is an array substrate, a color filter is disposed on the second substrate.
Optionally, in some embodiments, the line width of the black matrix is about 4.996 µm, the line width of the crosstalk region is about 5 µm, the line width of the shielding portion is about 49.964 µm, and the line width of the sub-pixel is about 50 µm.
Optionally, in some embodiments, a material of the grating is same to a material of the black matrix.
Optionally, in some embodiments, the grating and the black matrix are formed integrally.
Optionally, in some embodiments, the black matrix and the grating are formed on a surface of the first substrate facing away from the second substrate.
Optionally, in some embodiments, the 3D display device further includes: a third substrate attached to the surface of the first substrate facing away from the second substrate; the black matrix and the grating are formed on a surface of the third substrate facing away from the second substrate.
Optionally, in some embodiments, the 3D display device further includes: a film substrate attached to the surface of the first substrate facing away from the second substrate; the black matrix and the grating are formed on a surface of the film substrate facing away from the second substrate.
According to another aspect of the present invention, a method for manufacturing the 3D display device according to appended claim 9 is provided.
Optionally, in some embodiments, the step of forming the black matrix and the grating on the side of the first substrate facing away from the second substrate includes: forming the black matrix and the grating on the surface of the first substrate facing away from the second substrate by a patterning process.
Optionally, in some embodiments, the step of forming the black matrix and the grating on the side of the first substrate facing away from the second substrate includes: forming the black matrix and the grating on a surface of a third substrate by a patterning process; and attaching the third substrate to the first substrate. The black matrix and the grating are located on a surface of the third substrate facing away from the second substrate.
Optionally, in some embodiments, the step of forming the black matrix and the grating on the side of the first substrate facing away from the second substrate includes: forming the black matrix and the grating on a surface of a film substrate by a patterning process; and attaching the film substrate to the first substrate. The black matrix and the grating are located on a surface of the film substrate facing away from the second substrate.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in embodiments of the disclosure or in the prior art, the appended drawings needed to be used in the description of the embodiments or the prior art will be introduced briefly in the following. Obviously, the drawings in the following description are only some embodiments of the disclosure, and for those of ordinary skills in the art, other drawings may be obtained according to these drawings under the premise of not paying out creative work.

Fig. 1 is a schematic diagram of an optical path of a 3D display device under ideal conditions;
Fig. 2a is a schematic diagram of an optical path of a 3D display device according to an embodiment of the present disclosure;
Fig. 2b is a top view of the first substrate in the embodiment shown in Fig. 2a;
Fig. 2c is a schematic diagram of an optical path of a 3D display device according to another embodiment of the present disclosure;
Fig. 2d is a schematic diagram of an optical path of a 3D display device according to yet another embodiment of the present disclosure; and
Fig. 3 is a flowchart of a method for manufacturing a 3D display device according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE DISCLOSURE

In the following, the technical solutions in embodiments of the disclosure will be described clearly and completely in connection with the drawings in the embodiments of the disclosure. Obviously, the described embodiments are only part of the embodiments of the disclosure, and not all of the embodiments. Based on the embodiments in the disclosure, all other embodiments obtained by those of ordinary skills in the art under the premise of not paying out creative work pertain to the protection scope of the disclosure.
In view of the deficiencies in the prior art, a 3D display device and a method for manufacturing the same are provided, which at least partially solve the problem that the display effect and the production capacity of the existing 3D display device cannot be balanced.
As shown in Fig. 2a and Fig. 2b, the present disclosure provides a 3D display device. The 3D display device includes: a first substrate 1; a second substrate 2 disposed opposite to the first substrate 1; a black matrix 3; and a grating 4. The black matrix 3 and the grating 4 are disposed on a side of the first substrate 1 facing away from the second substrate 2; the black matrix 3 and the grating 4 are disposed in a same layer; and a side of the first substrate 1 where the black matrix 3 and the grating 4 are located is a light exit side of the 3D display device.
In this embodiment, the 3D display device is a liquid crystal display device, that is, a liquid crystal layer (shown by reference sign 5 in Fig. 2a) may be disposed between the first substrate 1 and the second substrate 2.
The second substrate 2 may be an array substrate, that is, the second substrate 2 may include a plurality of sub-pixels. Optionally, the second substrate 2 can also be provided with red, green and blue color filters (as shown by r, g, and b in Fig. 2a), and then the second substrate 2 is a COA (color filter on array) substrate. As shown in Fig. 2a and Fig. 2b, the line width of the black matrix 3 is m, and the projection of the black matrix 3 on the second substrate 2 is located between the directly adjacent sub-pixels for shielding the metal wiring of the thin film transistor on the second substrate 2. It should be noted that the "projection" referred to herein is a projection (i.e., oblique projection) of light received by the human eye on the second substrate 2. That is, along the sight line of the user, the projection of the black matrix on the second substrate is located between the directly adjacent sub-pixels. In the embodiment of the present disclosure, as shown in Fig. 2a, two directly adjacent sub-pixels may be a left-eye pixel L and a right-eye pixel R, respectively.
Optionally, in some embodiments, the second substrate is an array substrate, a color filter is disposed on the second substrate, and a side of the first substrate facing the second substrate is not provided with a black matrix.
Those skilled in the art can understand that the second substrate 2 in the embodiment of the present disclosure may also be an OLED display substrate, and thus the 3D display device of the embodiment of the present disclosure may also be an OLED display device.
It should be noted that the black matrix is usually disposed on a substrate opposite to a COA substrate, and the black matrix is usually disposed on a side of the substrate facing the COA substrate. In the present disclosure, since the black matrix 3 is disposed on the side of the first substrate 1 facing away from the second substrate 2, the black matrix is no longer disposed on the side of the first substrate 1 adjacent to the second substrate 2.
If the first substrate is a COA substrate, and the black matrix is baked during the preparation of the black matrix, there will be a problem that water vapor release in the black matrix is insufficient. In the embodiment of the present disclosure, the black matrix and the grating are disposed on a side of the first substrate facing away from the second substrate, and the side of the first substrate on which the black matrix and the grating are located is the light exit side of the 3D display device. Since the black matrix and the grating are not disposed between the two substrates, the liquid crystal molecules inside the 3D display device are not affected, so there is no need for an additional baking process, thereby improving both the production capacity and the display effect of the 3D display device.
Optionally, the black matrix 3 has a line width m of 5-10 µm. In this way, the aperture ratio can be achieved and the effect of preventing crosstalk of adjacent sub-pixels can be ensured.
Further, in order to realize the 3D display effect, as shown in Fig. 2a and Fig. 2b, the 3D display device may further include a grating 4 located on a side of the first substrate 1 facing away from the second substrate 2. The grating 4 includes a plurality of shielding portions 41 disposed in parallel with each other, the two side edges of each shielding portion 41 are in contact with the black matrix 3, respectively. A grating opening 42 is formed between two adjacent shielding portions 41.
Since the left eye and the right eye of human are horizontally located at two different positions, the grating is placed perpendicular to the two eyes (i.e., placed in parallel with the 3D display device), the left and right eyes thus have different viewing angles to the grating. The images presented by the 3D display device for the two eyes are different, and there is a parallax between the left eye image and the right eye image. Due to the existence of the parallax, a stereoscopic sense can be generated by the human brain, thereby realizing a 3D display effect.
In an ideal state, the optical path of the 3D display device provided with the grating 4 is shown in Fig. 1. The sub-pixel regions of the second substrate 2 (i.e., the left-eye pixel region L and the right-eye pixel region R in Fig. 1) are all effective light-emitting region, that is, there is no non-light-emitting region between adjacent sub-pixels. However, in practice, since the display element such as a thin film transistor is provided on the second substrate 2, it is inevitable to occupy a portion of the sub-pixel region. The region occupied by the thin film transistor in the sub-pixel is a non-light-emitting region. The left-eye pixel region L and the right-eye pixel region R are effective light-emitting regions, and form a sub-pixel together with the non-light-emitting region. As shown in Fig. 2a, the non-light-emitting region A needs to be shielded by the black matrix 3. Therefore, the projection of the black matrix 3 on the second substrate 2 covers the non-light-emitting region A.
In the embodiment of the present disclosure, as shown in Fig. 2a and Fig. 2b, the grating 4 includes a plurality of shielding portions 41 disposed in parallel with each other, and two side edges of each shielding portion 41 are respectively in contact with the black matrix 3.
It should be noted that the dotted line in Fig. 2a is the optical path when the black matrix 3 is not disposed outside the 3D display device (i.e., the optical path of Fig. 1), and the solid line in Fig. 2a is the light path when the black matrix 3 is connected to the corresponding shielding portions 41 of the grating 4. As can be seen from Fig. 2a, the projection of the black matrix 3 on the second substrate 2 can effectively cover the non-light-emitting regions A.
With the above arrangement, the problem that the poor display effect of the 3D display device caused by insufficient water vapor release of the black matrix 3 can be solved, and an additional baking process is not required, thereby taking into consideration both the production capacity and the display effect. In addition, the black matrix and the grating are skillfully combined, and 3D stereoscopic display can be realized on the basis of taking into account both the production capacity and display effect.
Optionally, in some embodiments, the second substrate includes a plurality of sub-pixels, and a crosstalk region between adjacent sub-pixels.
Optionally, in some embodiments, the black matrix, the shielding portion, the sub-pixel, and the crosstalk region satisfy the following relationship: $m = c \times k / 2;$
$a + 2 m = (p + c) \times k;$
m is a line width of the black matrix, c is a line width of the crosstalk region, k is a shrinkage ratio, a is a line width of the shielding portion, and p is a line width of the sub-pixel. The shrinkage rate k is related to the distance from the user to the display device and the thickness of the display device, and can be set according to actual conditions.
Optionally, in some embodiments, the line width of the black matrix is about 4.996 µm, the line width of the crosstalk region is about 5 µm, the shrinkage ratio is about 0.9993, the line width of the shielding portion is about 49.964 µm, and the line width of the sub-pixel is about 50 µm.
Optionally, in some embodiments, a material of the grating 4 is same to a material of the black matrix 3.
Optionally, in some embodiments, the grating 4 and the black matrix 3 are formed integrally. When the grating 4 is integrally formed with the black matrix 3, the line width of the grating 4 is changed from the original a to a+2m. In this way, the grating 4 can be used for 3D display, and the black matrix 3 can be used to shield the wiring of the thin film transistor on the first substrate 1.
As shown in Fig. 2a and Fig. 2b, the line width a of the shielding portion 41 of the grating 4 may be 40-100 µm. It should be noted that the line width a of the shielding portion 41 can be set according to the type of the 3D display device. For example, if the 3D display device is a portable 3D display device such as a mobile phone or a pad, since the human eye is closer to the 3D display device (usually about 30 cm), the line width a of the shielding portion 41 can be a small value within the above range. If the 3D display device is a large 3D display device such as a television or a display, since the human eye is far away from the 3D display device (usually 1.5 m - 2 m), the line width a of the shielding portion 41 can be a large value within the above range.
There are various arrangement modes in which the black matrix 3 is disposed on the side of the first substrate 1 facing away from the second substrate 2. Hereinafter, various arrangement modes of the black matrix 3 will be described in detail.
Mode 1: as shown in Fig. 2a, the black matrix 3 and the grating 4 are formed on a surface of the first substrate 1 facing away from the second substrate 2. The black matrix 3 and the grating 4 can be arranged in mode 1, so that the black matrix 3 and the grating 4 are directly formed on the first substrate 1, and the preparation process is simple.
Mode 2: as shown in Fig. 2c, the 3D display device further includes a third substrate 6 attached to the surface of the first substrate 1 facing away from the second substrate 2; the black matrix 3 and the grating 4 are formed on a surface of the third substrate 6 facing away from the second substrate 2. That is, the black matrix 3 and the grating 4 are not directly formed on the first substrate 1, but are directly formed on the third substrate 6. The third substrate 6 provided with the black matrix 3 is then attached to the first substrate 1, so that the black matrix 3 is located on the light exit side of the 3D display device.
Mode 3: as shown in Fig. 2d, the 3D display device further includes a film substrate 7 attached to the surface of the first substrate 1 facing away from the second substrate 2; the black matrix 3 and the grating 4 are formed on a surface of the film substrate 7 facing away from the second substrate 2. That is, the black matrix 3 and the grating 4 are not directly formed on the first substrate 1, but are directly formed on the film substrate 7. The film substrate 7 provided with the black matrix 3 is then attached to the first substrate 1, so that the black matrix 3 is located on the light exit side of the 3D display device.
It should be noted that, if the 3D display device further includes the grating 4 and the material of the grating 4 is the same as the material of the black matrix 3, in the above three modes, the grating 4 and the black matrix 3 may be formed simultaneously.
The present disclosure also provides a method of manufacturing the 3D display device as described above. The method will be described in detail below with reference to Figs. 2a-2d and Fig. 3. The method includes the following steps.
Step S 1, providing a first substrate 1 and a second substrate 2 opposite to the first substrate 1.
Specifically, the second substrate 2 may be an array substrate. Optionally, the second substrate 2 can also be provided with red, green and blue color filters, and then the second substrate 2 is a COA substrate. Correspondingly, the first substrate 1 may be a counter substrate, and a side of the first substrate 1 adjacent to the second substrate 2 is not provided with a black matrix.
Step S2, forming a black matrix 3 and a grating 4 on a side of the first substrate 1 facing away from the second substrate 2.
The black matrix 3 and the grating 4 are disposed in a same layer; and a side of the first substrate 1 where the black matrix 3 and the grating 4 are located is a light exit side of the 3D display device.
Optionally, in some embodiments, the second substrate includes a plurality of sub-pixels, and a crosstalk region between adjacent sub-pixels.
Optionally, in some embodiments, the black matrix, the shielding portion, the sub-pixel, and the crosstalk region satisfy the following relationship: $m = c \times k / 2;$
$a + 2 m = (p + c) \times k;$
m is a line width of the black matrix, c is a line width of the crosstalk region, k is a shrinkage ratio, a is a line width of the shielding portion, and p is a line width of the sub-pixel. The shrinkage rate k is related to the distance from the user to the display device and the thickness of the display device, and can be set according to actual conditions.
Optionally, the black matrix 3 has a line width m of 5-10 µm.
In particular, the step of forming a black matrix 3 and a grating 4 on a side of the first substrate 1 facing away from the second substrate 2 can be realized by any one of the following solutions.
Solution 1: as shown in Fig. 2a, the black matrix and the grating are formed on a surface of the first substrate facing away from the second substrate by a patterning process. In this way, the black matrix 3 and the grating 4 are directly formed on the first substrate 1, and the preparation process is simple.
Solution 2: as shown in Fig. 2c, this solution specifically includes the following steps: forming the black matrix 3 and the grating 4 on a surface of a third substrate 6 by a patterning process; and attaching the third substrate 6 to the first substrate 1. The black matrix 3 and the grating 4 are located on a surface of the third substrate 6 facing away from the second substrate 2.
By applying solution 2, the black matrix 3 and the grating 4 are not directly formed on the first substrate 1, but are directly formed on the third substrate 6. The third substrate 6 provided with the black matrix 3 is then attached to the first substrate 1, so that the black matrix 3 is located on the light exit side of the 3D display device.
Solution 3: as shown in Fig. 2d, this solution specifically includes the following steps: forming the black matrix 3 and the grating 4 on a surface of a film substrate 7 by a patterning process; and attaching the film substrate 7 to the first substrate 1. The black matrix 3 and the grating 4 are located on a surface of the film substrate 7 facing away from the second substrate 2.
By applying solution 3, the black matrix 3 and the grating 4 are not directly formed on the first substrate 1, but are directly formed on the film substrate 7. The film substrate 7 provided with the black matrix 3 is then attached to the first substrate 1, so that the black matrix 3 is located on the light exit side of the 3D display device.
It should be noted that, in the step S2 (which can be realized by any one of the above three solutions), the grating 4 may be formed in synchronization with the black matrix 3. In some embodiments, as shown in Fig. 2a and Fig. 2b, the grating 4 includes a plurality of shielding portions 41 disposed in parallel with each other, and two side edges of each shielding portion 41 are in contact with the black matrix 3, respectively.
Optionally, the line width a of the shielding portion 41 of the grating 4 may be 40-100 µm.
The manufacturing method of the 3D display device is simple in process and easy to implement. Especially if the 3D display device includes the grating 4, the grating 4 and the black matrix 3 can be formed simultaneously, which can further simplify the preparation process.
In the embodiment of the present disclosure, the black matrix and the grating are disposed on a side of the first substrate facing away from the second substrate, and the side of the first substrate on which the black matrix and the grating are located is the light exit side of the 3D display device. Since the black matrix and the grating are not disposed between the two substrates, the liquid crystal molecules inside the 3D display device are not affected, so there is no need for an additional baking process, thereby improving both the production capacity and the display effect of the 3D display device.
It can be understood that the above embodiments are merely exemplary embodiments used for illustrating the principle of the present invention, and the present invention is not limited thereto. For a person of ordinary skill in the art, variations and improvements may be made without departing from the scope of the present invention defined by the appended claims.

Claims

A 3D display device, comprising:
a first substrate (1);

a second substrate (2) disposed opposite to the first substrate (1),

the second substrate (2) comprising a plurality of left-eye and right-eye subpixels arranged in a two-dimensional matrix and respectively configured to display a left-eye image and a right-eye image;

a black matrix (3); and

a grating (4) configured to generate a parallax between the left-eye image and the right-eye image;

wherein the black matrix (3) and the grating (4) are disposed on a side of the first substrate (1) facing away from the second substrate (2); and a side of the first substrate (1) where the black matrix (3) and the grating (4) are located is a light exit side of the 3D display device;

wherein the grating (4) is constituted by a plurality of shielding portions (41) disposed in parallel with each other, characterized in that the black matrix (3) and the grating (4) are disposed in a same layer and the two side edges of each shielding portion (41) are respectively in contact with the black matrix (3); the second substrate (2) comprises a non-light-emitting region (A) between adjacent sub-pixels (L, R), the black matrix (3) is configured to shield the non-light-emitting region (A), the black matrix (3), the shielding portion (41), the sub-pixel (L, R), and the non-light-emitting region (A) satisfy the following relationship: $ac = 2 mp$

wherein
m is a line width of the black matrix (3), the black matrix (3) includes striped lines that extend along a column direction of the matrix of the plurality of sub-pixels (L, R), and the line width of the black matrix (3) is the width of said striped lines of the black matrix (3) in a row direction of the matrix of the plurality of sub-pixels (L, R);

c is a line width of the non-light-emitting region (A), and the line width of the non-light-emitting region (A) is the width of the non-light-emitting region (A) in the row direction of the matrix of the plurality of sub-pixels (L, R);

a is a line width of the shielding portion (41), the shielding portion (41) is in a shape of strip and extends along the column direction of the matrix of the plurality of sub-pixels (L, R), and the line width of the shielding portion (41) is the width of the shielding portion (41) in the row direction of the matrix of the plurality of sub-pixels (L, R); and

p is a line width of the sub-pixel (L, R), and the line width of the sub-pixel (L, R) is the width of the sub-pixel (L, R) in the row direction of the matrix of the plurality of sub-pixels (L, R).
The 3D display device according to claim 1, wherein the second substrate (2) is an array substrate, a color filter is disposed on the second substrate (2).
The 3D display device according to claim 1, wherein the line width of the black matrix (3) is about 4.996 µm, the line width of the non-light-emitting region (A) is about 5 µm, the line width of the shielding portion (41) is about 49.964 µm, and the line width of the sub-pixel (L, R) is about 50 µm.
The 3D display device according to claim 1, wherein a material of the grating (4) is same to a material of the black matrix (3).
The 3D display device according to claim 4, wherein the grating (4) and the black matrix (3) are formed integrally.
The 3D display device according to any one of claims 1-5, wherein the black matrix (3) and the grating (4) are formed on a surface of the first substrate (1) facing away from the second substrate (2).
The 3D display device according to any one of claims 1-5, further comprising: a third substrate attached to the surface of the first substrate (1) facing away from the second substrate (2); wherein the black matrix (3) and the grating (4) are formed on a surface of the third substrate facing away from the second substrate (2).
The 3D display device according to any one of claims 1-5, further comprising: a film substrate attached to the surface of the first substrate (1) facing away from the second substrate (2); wherein the black matrix (3) and the grating (4) are formed on a surface of the film substrate facing away from the second substrate (2).
A method for manufacturing a 3D display device, comprising:
providing a first substrate (1) and a second substrate (2) opposite to the first substrate (1), the second substrate (2) comprising a plurality of left-eye and right-eye subpixels arranged in a two-dimensional matrix and respectively configured to display a left-eye image and a right-eye image; and forming a black matrix (3) and a grating (4) on a side of the first substrate (1) facing away from the second substrate (2);

and a side of the first substrate (1) where the black matrix (3) and the grating (4) are located is a light exit side of the 3D display device;

wherein the grating (4) is configured to generate a parallax between the left-eye image and the right-eye image;

and consists of a plurality of shielding portions (41) disposed in parallel with each other, and the two side edges of each shielding portion (41) are respectively in contact with the black matrix (3); the second substrate (2) comprises a non-light-emitting region (A) between adjacent sub-pixels (L, R), the black matrix (3) is configured to shield the non-light-emitting region (A);

the black matrix (3), the shielding portion (41), the sub-pixel (L, R), and the non-light-emitting region (A) satisfy the following relationship: $ac = 2 mp$

wherein
m is a line width of the black matrix (3), the black matrix (3) includes striped lines that extend along a column direction of the matrix of the plurality of sub-pixels (L, R), and the line width of the black matrix (3) is the width of said striped lines of the black matrix (3) in a row direction of the matrix of the plurality of sub-pixels (L, R);

c is a line width of the non-light-emitting region (A), and the line width of the non-light-emitting region (A) is the width of the non-light-emitting region (A) in the row direction of the matrix of the plurality of sub-pixels (L, R);

a is a line width of the shielding portion (41), the shielding portion (41) is in a shape of strip and extends along the column direction of the matrix of the plurality of sub-pixels (L, R), and the line width of the shielding portion (41) is the width of the shielding portion (41) in the row direction of the matrix of the plurality of sub-pixels (L, R); and

p is a line width of the sub-pixel (L, R), and the line width of the sub-pixel (L, R) is the width of the sub-pixel (L, R) in the row direction of the matrix of the plurality of sub-pixels (L, R).
The method according to claim 9, wherein forming the black matrix (3) and the grating (4) on the side of the first substrate (1) facing away from the second substrate (2) comprises:
forming the black matrix (3) and the grating (4) on the surface of the first substrate (1) facing away from the second substrate (2) by a patterning process.
The method according to claim 9, wherein forming the black matrix (3) and the grating (4) on the side of the first substrate (1) facing away from the second substrate (2) comprises:
forming the black matrix (3) and the grating (4) on a surface of a third substrate by a patterning process; and

attaching the third substrate to the first substrate (1);

wherein the black matrix (3) and the grating (4) are located on a surface of the third substrate facing away from the second substrate (2).
The method according to claim 9, wherein forming the black matrix (3) and the grating (4) on the side of the first substrate (1) facing away from the second substrate (2) comprises:
forming the black matrix (3) and the grating (4) on a surface of a film substrate by a patterning process; and

attaching the film substrate to the first substrate (1);

wherein the black matrix (3) and the grating (4) are located on a surface of the film substrate facing away from the second substrate (2).